12-14-2013, 09:51 AM
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CC Member
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Join Date: Feb 2001
Location: BRADENTON,
FL
Cobra Make, Engine: KIRKHAM 427 S/C, SHELBY 427 ALUM. STROKER
Posts: 1,396
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Not Ranked
As it turns out, the AR3924's ARE the top of the heat range, so no help there.
I re-vamped the carb linkage and got them synced @ 2 & 3Krpm, swapped the idle jets from 65 to 70, and drove it. Ran the best it has yet, aside from too rich (afr's 11.3-12 from idle thru 5krpm) thought "all I have to do now is tweek the mixture leaner in the low/mid range and I'm done !
Wrong ! I just had to pull the plugs and take a look. Still the same: left bank black and oil fouled (although I had no miss as before) and rt bank lean to normal, with some oil present. Guess i'll have to put an o2 probe in the rt exhaust to make sure I don't get to lean on that side. Still can't figure why I'm getting the oil in the plugs, unless it's rings.
Engine only has 7-800 mi on it.
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